Motor-geared sewing machine



Oct. l, 1929. c. w. HDOUBLER/ r1,730,141

MOTOR GEARED SEWING IIIA/CHINE Filed July 2, 1925 ma m" v VAT g IN VENTOR.

TTORNEY Patented Oct. 1, 1929 PATENT oFFics CHARLES W. HDOU'BLER, OFRACINE, WISCONSIN MOTOR-GEARED SEVJING MACHINE Application led July 2,

This invention relates to improvements in motor geared sewing machines.

It is one of the objects of the present invention to provide a motorgeared sewing machine in which the motor and driving mechanism ispositioned within the arm of the sewing machine.

A further object of the invention is to provide a motor geared sewingmachine in which 1o the driving connection may be easily connected toand disconnected from the sewing machine shaft in a very simple mannerand eXteriorly of the arm of the sewing machine.

A further object of the invention is to pro- 15 vide a motor gearedsewing machine. in which the armature of the motor is journaled entirelyin the arm of the sewing machine.

A further object of the invention vis to provide a motor geared sewingmachine in which 20 the sewing machine shaft is provided with a squaredportion for connecting the clutch member thereto.

A further object of the invention is to provide a motor driven sewingmachine having a friction driven bobbin-winder which may be rotatedduring the operation of the machine or while the sewing machine isdisconnected.

A further object of the invention is to provide a motor geared sewingmachine which is very compact, is strong and durable, and inexpensive tomanufacture, and is well adapted for the purpose described.

With the above and other objects in view, the invention consists of theimproved motor geared sewing machine and its parts and combinations asset forth in the claims, and all equivalents thereof.

In the accompanying drawing in which the same reference charactersindicate the same parts in all of the views:

Fig. 1 is a side view, partly taken on section line 1--1 of Fig. 2, of aportion of the standard and arm of a sewing machine enclosing 45 themotor and gearing;

Fig. 2 is a rear view thereof with the hand wheel removed;

Fig. 3 is a vertical sectional detail view showing a portion of thecranked shaft and 50 parts connected thereto; and

lpartment 17 closed by an inner cover 18 se- 1925. Serial No. 41,096.

Fig. 4 is a sectional detail view of the clutch mechanism.

Referring to the drawing, thev numeral 8 indicates a tubular standard ofa sewing machine, and 9 a tubular arm communicating with the standardand projecting therefrom, said parts forming the head of the machine.The upper portion of the standard is formed with a side extension 10 toprovide space for receiving an electric motor 11 mounted therein. ATherear portion of the extension and the corresponding portion of thestandard in horizontal alinement therewith are opened and closed by acap or cover 12 which is secured in position by screws 13. Said ycap isrecessed into the parts, as at 12', to hold the parts in alinement. Thearmature shaft 14 of the motor yis journaled in the extension 10 and inthe cap 12, and the motor is maintained in position byscrews 15 whichthread into r portions of the extension. The extension and cap are alsoprovided with oil cups 16 for lubricating the armature shaft 14. The cap12 is formed on its inner, side with a gear comcuredto the outercap byscrews 19. A train Iof gears2(), 21, 22,A 23 and 24 are positionedl,within the compartment, and are intermes'hed to transmit motion fromthe armature shaft 14 to the cranked sewing machine drive shaft Y 25,andf'also to the bobbin-winderv friction wheel 26 whichprojectsoutwardly a slight distance. through an'elongated opening 27 formed in aside portionof the cap 12. The

gear is looselyjournaled on the sewing ma- Y chinel shaft and the gearvor pinion 23 is mounted fast on the armature shaft 14 while the gears 21and 22 are lconnected together and are mounted on the short shaft 28journaled the wheel of larger diameter and be thrown i" ofi' therefromby centrifugal force in the compartment and against the gears therein.Commutator brushes 11 are also mounted in the side extension 10.

The gear 20 is mounted on and forms part of a jawed clutch member 31which is journaled on the cranked sewing machine shaft 25 between thecap bearing 12 and shoulders 32 formed by a squared or rectangularportion 33 of the shaft 25. has slidably mounted thereon a j awed clutchmember 34 complementary to the clutch member 31 and which member 34 mayhe moved into clutching engagement with the member 31 to lock the gear20 to the shaft 25 when it is desired to run the machine.` The member 34is formed with a squared bore 34 to fit the squared shaft portion 33 andturn therewith. The clutch member 34 is also formed with an annulargroove 35 to receive a semicircular shoe 36 positioned therein. A medialportion of the shoe is formed with an outward projection 36 whichextends through a rectangular' opening 37 in the operating lever 38.Said lever is pivotally connected at its lower end to the cover 18 ofthe cap 12 as indicated by the numeral 39 while the upper end eX- tendsthrough an elongated opening 40 in the upper portion of the sewingmachine .arm 9 as clearly indicated in Fig. 1.

An arm 41 pivotally and frictionally connected to the standard 8 by apivot bolt 42 has journaled in its upper end a bobbin shaft 43 forreceiving ordinary bobbins (not shown), and said shaft has mounted fastthereon a rubberbanded friction wheel .44 which frictionally engages thewheel 26 and is rotated thereby when the arm 41 is yswung upwardly.

A hand wheel 45 is mounted on the outer end of the cranked shaft forturning or stopping the shaft manually. As thus constructed the entirerotary parts of the machine can be disconnected from the motor andremain at rest while the motor is running and the bobbin winder can berotated through the gears whether or Vnot the sewing machine elementsare in operation.

VFrom the foregoing description it will be seen that the motor ismounted entirely in the arm of theI machine but can be easily removed bytaking off the end cap. Furthermore the end cap compartment alsoprovides for the easy removal of all of the gears as a unit in a verysimple manner, and the location of the gears and the motor do notinterfere with the other portions of the sewing machine. The squaredportion of the sewing machine shaft eliminates the use of keys or screwsand provides a simple connection for the clutch member.

What I claim as my invention is:

1. A motor geared sewing machine, comprisinga tubular sewing machinehead hav ing a` rearopenvend portion, a cap closing Said squaredportiony said end, a horizontal drive'shaft journaled in the head andthe cap, and having a rectangular portion, a clutch member slidably, butnonerotatably mounted on the shaft, a gear wheel journaled on the shaftand having a complementary clutch portion engageable by the clutchmember to lock the gear to the shaft, means for moving said clutchmember into and out of engagement with the clutch portion, an electricmotor journaled entirely in the head and the cap and having its shaftparallel to the drive shaft, and a train of gears connecting Athe motorshaft to the gear wheel on the horizontal drive shaft.

2. A motor gea-red sewing machine, comprising a tubular sewing machinehead having a rear open end portion, a cap closing said end and havingan inner compartment, a horizontal drive shaft journaled in the head andcap and extending through the compartment, a clutch member slidably butnon-ro-V tatably mounted on the drive shaft, a gear Wheel positioned inthe compartment and journaled on the drive shaft and having acomplementary clutch portion engageable by the clutch member to lock thegear to the shaft, means for moving said clutch member into and out ofengagement with the clutch portion, an electric motor entirely withinthe head and having its shaft parallel to the drive shaft and journaledin the head andr eXtending through the compartment and journaled inthecap, and a train of gears within the cap compartment and connecting themotor shaft to the gear wheel on the drive shaft.

In testimony whereof, I affix my signature. l L

CHARLES w. HDOUBLER.

